<div dir="ltr"><div dir="ltr"><br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, May 17, 2019 at 6:38 AM Gert Doering <<a href="mailto:gert@space.net">gert@space.net</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Hi,<br>
<br>
On Thu, May 16, 2019 at 01:51:51PM -0700, Nick Buraglio wrote:<br>
> Native IPv6 is clearly the right way to implement the service. However, my<br>
> question is "why filter 2002::/16?". It doesn't pose any more risk than a<br>
> native IPv6 address and there are some reasons to use it. Filtering it is<br>
> wrought with the possibilities for poor customer experience. My stance is<br>
> typically "don't filter $stuff unless you can identify a well defined<br>
> risk".<br>
<br>
Filtering it would allow the client to fall back to IPv4, instead of<br>
letting it go onward with poor IPv6.<br>
<br>
Unless you run a local relay you'll be hard pressed today to find any<br>
case where 2002:: to *non* 2002:: traffic won't be significantly worse<br>
than "just do IPv4" (in terms of "latency", "reliability", "packet loss").<br>
<br>
2002:: to 2002:: is usually OK, as it follows the IPv4 path between<br>
both sides (thus, same latency, packet loss, etc).<br></blockquote><div><br></div><div>A few questions;</div><div><br></div><div>Are you generating ICMPv6 toward non-2002::/16 sources for traffic destined to 2002::/16? </div><div>Are you generating ICMPv6 toward 2002::/16 source for traffic destined to non-2002::/16?</div><div>For the later, where are you getting the route for 2002::/16 from? </div><div><br></div><div>Thanks</div></div>-- <br><div dir="ltr" class="gmail_signature">===============================================<br>David Farmer <a href="mailto:Email%3Afarmer@umn.edu" target="_blank">Email:farmer@umn.edu</a><br>Networking & Telecommunication Services<br>Office of Information Technology<br>University of Minnesota <br>2218 University Ave SE Phone: 612-626-0815<br>Minneapolis, MN 55414-3029 Cell: 612-812-9952<br>=============================================== </div></div>